Quarterly Financial Data (Unaudited) (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017
Effect of Fourth Quarter Events [Line Items]
Impairment charge related to long-lived assets	$ 4,393
Impairment charge related to long-lived assets, net	3,558
Inventory write-down	10,346								$ 12,381	$ 4,913
Inventory write-down, net	7,606
Chief Executive Officer Succession Plan expense, gross			$ 10,148	$ 19,553
Chief Executive Officer Succession Plan expense, net			7,484	14,420					30,156	520	$ 0
Professional fees			920	3,414	$ 2,887	$ 3,313	$ 4,451	$ 3,642	4,334	9,293	29,562
Professional fees, net			678	2,518	1,941	2,654	3,346	2,638
Intangibles impairment									33,719	14,033	40,452
Intangibles impairment, net			13,374
Goodwill impairment					7,700				0	7,700	0
Goodwill impairment, net					5,553
Insurance proceeds								5,000
Insurance proceeds, net								$ 3,622
Trade Names
Effect of Fourth Quarter Events [Line Items]
Intangibles impairment			17,900		5,632				17,900	5,632
Intangibles impairment, net					5,192
Disposed of by Sale | Hain Pure Protein
Effect of Fourth Quarter Events [Line Items]
Pre-tax loss		$ (40,223)							(40,859)	0	0
Net of tax loss		29,511
Asset impairments		51,348	54,946	2,958	78,464				109,252	78,464	0
Asset impairments, net		$ 37,532	$ 40,314	2,170	52,699
United Kingdom
Effect of Fourth Quarter Events [Line Items]
Impairment charge related to long-lived assets	5,617
Impairment charge related to long-lived assets, net	4,143
United Kingdom | Manufacturing Facility
Effect of Fourth Quarter Events [Line Items]
Impairment charge related to long-lived assets				4,243		2,557			$ 6,166	$ 6,344	23,712
Impairment charge related to long-lived assets, net				$ 3,436		2,050
United States
Effect of Fourth Quarter Events [Line Items]
Impairment charge related to long-lived assets	5,617					2,057	3,449				$ 2,661
Impairment charge related to long-lived assets, net	$ 4,143					$ 1,648	$ 2,593
United States | Manufacturing Facility
Effect of Fourth Quarter Events [Line Items]
Impairment charge related to long-lived assets					113
Impairment charge related to long-lived assets, net					$ 104